2012 Honda Civic won't start up unless I step on the gas pedal and turn key simultaneously?

I have already changed 3 batteries over the course of approximately 90,000 miles. I recently changed the 3rd battery as well as the spark plugs, but the car still wouldn't start unless I step on the gas pedal first.

Try checking the FUEL PUMP. If you have to step on the gas to supply enough fuel to start, the battery and spark plugs are the LAST place to look for the problem.